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Chronological List of Additional Transportation Conformity Rulemakings
Transportation
Conformity
- Main Transportation Conformity Page
- General Information
- Policy Guidance
- Training Materials
- Regulations
- Adequacy Review of SIP Submissions
- Regional Contacts
NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.
EPA has published several rule amendments in the Federal Register since transportation conformity was enacted as part of the 1990 Clean Air Act. These previous rulemakings include preamble text that explain rule provisions that remain in place today and can be accessed here.
SAFETEA-LU Rulemaking
Transportation Conformity Rule Amendments to Implement Provisions Contained in the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (published January 24, 2008)
EPA has updated the transportation conformity rule to make it consistent with the Clean Air Act as amended by SAFETEA-LU.
- Final Rule | PDF version (23 pp, 200K)
- Fact Sheet | PDF Version (2 pp, 101K, EPA-420-F-08-002, January 2008)
- Joint EPA-DOT Interim Guidance for Implementing SAFETEA-LU's Conformity Provisions (February 2006) While the majority of this guidance is superceded by the final rule, Section 5 (TCMs) and Section 7 (conformity SIPs) still apply. EPA will update this guidance shortly. Until then, please also note that the conformity SIP guidance of November 2004 also applies.
- Proposed Rule | PDF Version (24 pp, 212K, published May 2, 2007)
- Proposed Rule Fact Sheet | PDF Version (3 pp, 93K, EPA-420-F-07-018, April 2007)
Rulemakings that Address 8-hour Ozone and Particulate Matter Air Quality Standards
- March 10, 2006 Transportation Conformity Rule That Addresses Requirements for Project-level Conformity Determinations in PM2.5 and PM10 Nonattainment and Maintenance Areas (including supporting documentation).
EPA published a final rule that establishes requirements for project-level conformity determinations in PM2.5 nonattainment and maintenance areas, and that revises the existing requirements for project-level determinations in PM10 areas. - May 6, 2005 Transportation Conformity Rule That Addresses PM2.5 Precursors (including supporting documentation).
EPA published a final rule that addresses the requirements for considering transportation-related PM2.5 precursor emissions in conformity. - July 1, 2004 Final Rule (including supporting documentation).
This major rule amends specific provisions of the transportation conformity rule to address the new ozone and PM2.5 air quality standards and the March 2, 1999, conformity court decision. This rulemaking also includes preamble text that explains these changes to the conformity rule.
Contact: Meg Patulski at 734-214-4842 or patulski.meg@epa.gov
August 6, 2002, Final Rule
- Final Rule: Transportation Conformity Rule Amendments: Minor Revision of 18-Month Requirement for Initial SIP Submissions and Addition of Grace Period for Newly Designated Nonattainment Areas | PDF Version (75K, August 6, 2002) This final rule changes two provisions of the conformity rule. The first change will implement a 2000 Clean Air Act amendment that provides a one-year conformity grace period for areas that are designated nonattainment for the first time. The second change revises the timing for determining conformity following the initial submission of a state air quality plan.
- Proposed Rule: Transportation Conformity Rule Amendments: Minor Revision of 18-Month Requirement for Initial SIP Submissions and Addition of Grace Period for Newly Designated Nonattainment Areas | PDF Version (68K, October 5, 2001)
July 28, 2000, Federal Register Supplemental Notice of Proposed Rule
- Motor Vehicle Emissions Budgets in Attainment Demonstrations for the One-Hour National Ambient Air Quality Standard for Ozone This notice supplements a December 16, 1999 proposal to act on attainment demonstrations for ten areas in the eastern United States. It also clarifies when motor vehicle emissions budgets apply for the purposes of transportation conformity and it reopens the comment period to address issues relating to the applicability of budgets and accept additional information on proposed December 16, 1999 action.
April 10, 2000, Final Rule
- Final Rule: Transportation Conformity Amendment: Deletion of the Grace Period | PDF Version (147K, April 10, 2000). This rule deletes the grace period for transportation conformity in newly-designated nonattainment areas. This final rule is consistent with a 1997 court decision and addresses issues raised in a Petition for Reconsideration of the original 1993 transportation conformity rule.
- Proposed Rule: Transportation Conformity Amendment: Deletion of the Grace Period | PDF Version (13K, November 30, 1999)
March 18, 1999, Final Rule
- Final Rule: Transportation Conformity Rule Amendment for the Transportation Conformity Pilot Program | PDF Version (60K, March 18, 1999)
- Proposed Rule: Transportation Conformity Rule Amendment and Solicitation for Participation in the Transportation Conformity Pilot Program | PDF Version (44K, July 9, 1996)
Contact: Meg Patulski at 734-214-4842 or patulski.meg@epa.gov
1997 Conformity Rule
- Final Rule: Transportation Conformity Rule Amendments: Flexibility and Streamlining (August 15, 1997)
- Proposed Rule: Transportation Conformity Rule Amendments: Flexibility and Streamlining | PDF Version (272K, July 9, 1996)
November 1995 Rule Amendments
- Final Rule: Transportation Conformity Rule Amendments: Miscellaneous Revisions | PDF Version (66K, November 14,1995)
- Proposed Rule: Transportation Conformity Rule Amendments: Miscellaneous Revisions (August 29, 1995)
August 1995 Rule Amendments
- Final Rule: Transportation Conformity Rule Amendments: Transition to the Control Strategy Period | PDF Version (484K, August 7,1995)
- Interim Final Rule: Transportation Conformity Rule Amendments: Transition to the Control Strategy Period (PDF) (664K, February 8, 1995)
- Proposed Rule: Transportation Conformity Rule Amendments: Transition to the Control Strategy Period (PDF) (268K, February 8, 1995)
1993 Conformity Rule
- Final Rule: Criteria and Procedures for Determining Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Funded or Approved Under Title 23 U.S.C. or the Federal Transit Act (PDF) (13.3M, November 24, 1993)
- Proposed Rule: Criteria and Procedures for Determining Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Funded or Approved Under Title 23 U.S.C. or the Federal Transit Act (PDF) (5.5M, January 11, 1993)
For further information or assistance regarding this Web page, contact Meg Patulski at 734-214-4842 or patulski.meg@epa.gov